Feed mechanism for rolling-mills.



G. LAMBERT'& H. A. oARDozo.

FEED MECHANISM FOR ROLLING MILLS. f APPLICATION FILED ooT.1, 190e. n923, 1 89, Patented June 1, 1909.

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FEED MEGHANISM FOR-ROLLING MILLS. APPLIGATIQN FILED 90121, 190e.

923, 189. Patented June 1, 1909.

2 SHEETS-SHEET 2.

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sTATEs FATEN oFFIoE.

` cU'sTAvELAi/IEERT AND HENRI ALEXANDRE cARDoZo, oF PARIS, FRANCE,AssIGNoRS To .socIETEDETuDEs yFOUR vLA FABRICATION DES TUBES SANSsoU'DURE,

(BREVETS ET v rRooEnEs 'LAMBERT-CARDOZQ) oF PARIS, FRANCE.

' k'FEED MECHANISM FOR ROLLING-MILLS.

To all whomftt may concern:

- i Be it'knownr thatwe, GUSTAVE LAMBERT and HENRI ALEXANDRE CARDoZo,citizens of France, residing, respectively, at 44 Rue du vRanelaghandlltuejde Prony, in Paris,

France, have invented-new and useful lmprovements in Feed Mechanisms forRollingfills, of which-the yfollowing' is a specification.

- The reduction of solid or hollow bodies in rolling-mills having aplanetary motion is f often effected ata high temperature in which caseyit is highly important to feed the work lto the rollers as rapidly aspossiblein order ythat kthe entire operation may take place at kasubstantially uniform temperature. ln the cascof yhollow bodies/such asblanks for tubes, gun-barrels yand the like, it is moreoverde'sirable toimpart to the metal a cerytain'twist ortorsion 'for rthe purpose of de-.drawing by means of an example.

Figures `l and 1a show asectional elevation of the mechanism, Figs. 2and 2a show a plan keyed n y ybevel wheeld fixed to a shaft c; thelatter is view, kand lfig. 3 a detail view.

- Theframe ct of the improved feed-mechanism supvr orts a hollow shaft bto which is a'r evel wheel c meshing with another adapted'to be drivenin either direction by means of a pulley f placed between two loosepulleys f. The direction in which the shaft e is ydriven depends onywhether an uncrossed belt gk ora crossed belt g is placed upon vtherfixed pulley y When both the said belts are on the loose pulleys, themechanism is at rest.

'The shifting of the belt is effected by operating alever y. Themechanism by means of which the pulley f is driven is connected to thedriving mechanism ofthe rolling mill L L diagrammatically illustrated inlfig. 1 of ythe drawing; this mechanism is not illus trated in thedrawing.

To the right hand end kof the hollow shaft t k(Fig. 1) is fixed aninternally Screw-threaded sleevehin which Works va screw spindle i.

n Specification of Letters Patent. l y' Application led October 1, 1906.Serial No. 337,039.

Patented June 1, 1909.

The sleeve 71, revolves in a thrust-bearing y' of great strength. To thesleeve 7L is keyed a toothed wheel 7c which meshes with a toothed wheelZ loosely mounted on a shaft m. The latter is of non-circularcross-section, and in orderthat the wheel Z may revolve thereon a sleevea of cylindrical circumference is interposed between the wheel and theshaft.

The left-hand face of the wheel Z isprovided with clutch-teeth adaptedto coperate with the teethof a clutch member o slidable but notrevoluble on the shaft m.

The screw-spindle i revolves in eyes formed in a guide or rider pmounted thereon and between the two eyes traversed by the s indle atoothed wheel g is keyed to the latter. This toothed wheel g engages apinion 1" which is slidable but not revolubleon the shaft m. To theright-hand end s of the spindle i is fixed a box t internally squaredfor the reception of the squared end of a rod u. The latter forms themandrel on which tubular blanks are fed to the rolling mill. For rollingsolid bars or the like, a suitable dog-` chuck is substituted for therod u. The mandrel moves in suitable guides and the part u thereof is ofX-section in order to impart thereto a certain degree of elasticity inview of the torsional Strains to which the mandrel is subjected.

The tubular blank o to be treated in the rolling mill is firmly securedto the mandrel by being pressed through a draw-plate x.

The feed mechanism described allows firstly, of advancing the work athigh speed, and without rotation, for the purpose of Inoving it to aposition near the point where the action of the rolling mill begins.Secondly the feed mechanism allows of reducing, at the proper moment,the Speed with which the work is advanced, and of imparting thereto arotational movement which has the double purpose of subjecting all partsof the tubular body to the action of the rollers, and of impartingat thesame time, a powerful twist to the fibers of the metal. Thirdly themechanism allows of returning the mandrel at high speed to its originalposition when the rolling operation is completed. The manner in whichthese successive operations of the feed mechanism are produced is asfollows: The uncrossed belt is placed on the fast pulley f and impartsto the sleeve 7L rotation by which the screw spindle i is caused to moverapidly toward the right. Vhen the work has passed through thedraw-plate, the lever y is operated so that the uncrossed belt isshifted to a loose pulley and the crossed belt is shifted to the fixedpulley While the feed mechanism is momentarily at rest during theshifting of the belts a clutch-lever 2 (Figs. 2 and 3) is operated, sothat the toothed wheel l is coupled to the shaft m by means of theclutch-member and is thus adapted to drive the pinion r and the toothedwheel g keyed to the spindle t'.

The ratio of the toothed wheels and the manner in which they are drivenare such that although the screw-threaded sleeve h tends, after thereversal of the pulley f, to move the spindle i toward the left, thesaid spindle continues to move to the right owing to the rotationimparted to the toothed wheel g. The speed at which the spindle moves atthis stage of the operation is the resultant of the two differentialmotions imparted to it.

By altering the ratio of the two toothed wheels 7c, l and g, r thespeeds at which the operations take place can be altered.

Vhen the treatment of the work in the rolling-mill has been completed,the clutchmember o is thrown out of gear, whereupon the screw-threadedsleeve 7L causes the spindle i to return at high speed to its originalposition, no shifting of the belts being red quired for this purpose.

Having now described our invention, what we claim as new and desire tosecure by Letters Patent is:

A feed-mechanism for rolling-mills comprising in combination a sleeveprovided with an internally screw-threaded portion, means for impartingto said sleeve a rotary motion, a screw spindle engaging the screwthreaded portion of the sleeve, a toothed wheel secured to the sleeve, atoothed wheel keyed to the screw spindle, a shaft parallel to the screwspindle, a toothed wheel revolubly mounted on said shaft and meshingwith the toothed wheel secured to the sleeve, means for rendering thesaid revolubly mounted toothed wheel fixed in relation to said shaft,and a pinion longitudinally slidably secured on said shaft and meshingwith the toothed wheel keyed on the screw spindle, substanpially asdescribed and lor the purpose set "01th.

In testimony whereof we have signed our names to this specification inthe presence ol' two subscribing witnesses.

GUSTAVE LAMBERT. HENRI ALEXANDRE CARDGZO.

Vitnesses:

ANTOINE Liivorx, DEAN B. MASON.

